The Ahmadiyya branch of Islam has been subjected to various forms of religious persecution and discrimination since the movement's inception in 1889. The Ahmadiyya Muslim movement emerged within the Sunni tradition of Islam and its adherents believe in all of the five pillars and all of the articles of faith required of Muslims. Ahmadis are considered non-Muslims by many mainstream Muslims since they consider Mirza Ghulam Ahmad, the founder of the movement, to be the promised Mahdi and Messiah awaited by the Muslims.